{"uid":"cap_52yR960KQgmrpwdipBj_Q","slug":"veridoc-document-authenticity-verifier-23ea597e","name":"VeriDoc Document Authenticity Verifier","description":"VeriDoc verifies document authenticity on Ethereum Sepolia. Send a keccak-256 hash of a file; get back whether that exact document was registered on-chain and when. Privacy-first — the file is never uploaded, only the hash. Use for certificates, contracts, transcripts, or any registered document. POST JSON {\"hash\":\"0x…\"}. Speaks x402 — $0.05 USDC/call on Base, no account or API key needed.","url":"https://www.getbags.app/api/agent/link/pl-b7d021d3-ebd0-46be-8a8f-54158c8864d3","method":"GET","headers":{},"bodySchema":{"type":"object","$schema":"https://json-schema.org/draft/2020-12/schema","required":["input"],"properties":{"input":{"type":"object","required":["type","method","bodyType","body"],"properties":{"body":{"properties":{}},"type":{"type":"string","const":"http"},"method":{"enum":["GET"],"type":"string"},"bodyType":{"enum":["json","form-data","text"],"type":"string"}},"additionalProperties":false},"output":{"type":"object","required":["type"],"properties":{"type":{"type":"string"},"example":{"type":"object"}}}}},"responseSchema":null,"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.05","displayCostAsset":"USDC","priceDynamic":false,"priceHint":null,"priceStatus":"priced","priceSource":"probe","requiresHandshake":false,"reviewCount":0,"rating":{"score":"0.00","successRate":"0.00","reviews":0,"stars":null,"state":"unrated"},"availabilityStatus":"unknown","priceObserved":null,"sessionDeposit":null,"pricing":{"kind":"static","summary":"$0.05/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.05","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.05","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_uznZJITx8HUylx2jLg9cI","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.05","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Verifies whether a document was registered on the Ethereum Sepolia blockchain by checking its keccak-256 hash on-chain","exampleAgentPrompt":"Can you verify whether this document was officially registered on the blockchain? Its keccak-256 hash is 0x3a4b5c6d7e8f9a0b1c2d3e4f5a6b7c8d9e0f1a2b3c4d5e6f7a8b9c0d1e2f3a4b.","exampleUseCases":null,"resultDescription":"Returns whether the document hash was found registered on Ethereum Sepolia and, if so, the timestamp of when it was registered on-chain. No file data is ever transmitted — only the hash is checked.","failureModes":["Hash not found on-chain — document was never registered or hash is incorrect","Invalid hash format — must be a valid keccak-256 0x-prefixed hex string","Payment failure — $0.05 USDC x402 payment on Base not completed","Ethereum Sepolia node connectivity issues causing lookup failure","Malformed JSON body — missing or improperly formatted hash field"],"whenToPreferThis":"Use this endpoint when you need to cryptographically verify document authenticity using blockchain registration without uploading sensitive file contents. Ideal for privacy-sensitive use cases involving certificates, contracts, academic transcripts, or legal documents where you already have the keccak-256 hash and want to confirm on-chain registration status on Ethereum Sepolia.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-15T06:43:58.304Z","isFirstParty":false}